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skin and mucous membranes
An immune response is part of the body's defense against pathogens in which cells of the immune system react to each kind of pathogen with a defense targeted specifically toward that pathogen.
Active immunity
There are many types of immunoglobulin within the body. They are part of the immune response which the body activates when a pathogen/bacteria/virus enters the body. The body responds by initiating an innate response in which pathogens are phagocytosed (literally eating) by defense cells. The immunoglobulins help recognise these pathogens and tell the body that they are a foreign material so they can be destroyed.
The integumentary system (skin) and mucous membranes are the first line of defense. They provide a physical barrier against invasion of pathogens. Any break in this physical barrier, such as a cut, makes it easier for pathogens to enter your body.
Phagocyte
the body's second line of defense against pathogens is the B cells.
immune
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Lymphocytes
The immune system
the body's second line of defense against pathogens is the B cells.